Advanced Mathematics Primary 3 Time

A timer is set for 5 minutes. Jun Jie pauses the timer after 2 minutes 47 seconds. He then resumes and stops it 98 seconds later. How many seconds are left on the timer?

A 35 seconds
B 37 seconds
C 133 seconds
D 202 seconds
Show Worked Solution

Worked Solution

Step 1: Convert the timer duration to seconds. 5 minutes × 60 = 300 seconds. Step 2: Find the total time used. 2 min 47 s = (2 × 60) + 47 = 167 s. Total time used = 167 + 98 = 265 seconds. Step 3: Find the remaining time. 300 − 265 = 35 seconds. Answer: 35 seconds

Correct answer: 35 seconds

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